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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (24): 2529-2534. 上一篇    下一篇

研究论文

电化学合成Pt-Au复合催化剂及其对甲醇的电催化氧化

张红梅1，周卫强1,2，杜玉扣*,1，杨平1，徐景坤2   

  1. (1苏州大学化学化工学院 苏州 215123)
    (2江西科技师范学院 江西省有机功能分子重点实验室 南昌 330013)
  • 投稿日期:2009-11-02 修回日期:2010-05-31 发布日期:2010-08-11
  • 通讯作者: 杜玉扣 E-mail:duyk@suda.edu.cn

Electrochemical Synthesis of Pt-Au Composite Catalysts and Their Electrocatalytic Activity for Methanol Oxidation

Zhang Hongmei1 Zhou Weiqiang1,2 Du Yukou*,1 Yang Ping1 Xu Jingkun2   

  1. (1 College of Chemistry and Chemical Engineering, Soochow University, Suzhou 215123)
    (2Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013)
  • Received:2009-11-02 Revised:2010-05-31 Published:2010-08-11

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被引次数

10

在ITO导电玻璃上, 采用循环伏安法制备Pt-Au复合催化剂. 通过扫描电镜(SEM), X射线能量色散谱(EDX), X射线衍射(XRD)及其电化学方法对催化剂样品进行了表征. SEM结果表明, Pt-Au复合催化剂的形貌近似球状粒子. 循环伏安法和计时电流法的测试结果表明, 复合催化剂中Au的加入有利于甲醇的电催化氧化, 并提高了Pt对甲醇氧化的抗毒化能力. 同时研究了复合催化剂中Au的不同含量对甲醇氧化的影响, 结果表明, 当 Pt和Au物质的量比为1.07∶1时, Pt-Au/ITO催化剂具有最佳的甲醇电催化氧化活性.

关键词: 甲醇氧化, 复合催化剂, 电沉积, 电催化

Pt-Au composite catalysts are prepared on an indium tin oxide (ITO) glass substrate by cyclic voltammetry. Catalyst samples are characterized by scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDX), X-ray diffraction (XRD) and electrochemical methods. SEM results reveal that the samples are composed of near-spherical microparticles. Cyclic voltammetry and chronoamperometry results show that the addition of Au into composite catalysts is beneficial to the electro-catalytic oxidation of methanol and the anti-poisoning ability of platinum for methanol oxidation is enhanced. At the same time, the different content of Au in composite catalysts has been studied for methanol electro-oxidation, the results show that Pt-Au/ITO catalyst has the best catalytic activity for methanol electro-oxidation when the molar ratio of Pt to Au is 1.07∶1.

Key words: methanol oxidation, composite catalyst, electrodeposition, electrocatalysis